Intervarsity Press has an excellent book on the subject called "The Meaning of Millenium" which presents the four major views of the End of Days and a rebuttal of each view by the holders of other three .

For those who have faith, no explanation is neccessary.For those who have no faith, no explanation is possible.

St. Thomas Aquinas

If one turns his ear from hearing the Law, even his prayer is an abomination. Proverbs 28:9